How hard is to get a fellowship in sports medicine (as a family physician ) ?

It is not hard: You have to keep in mind this the medical part of sport medicne not the surgial part of it.

Competitive: Another physician implied that because it was not surgical it was easy to get a sports medicine position. I am really not sure what was meant by that comment. Please know that the primary care sports medicine training programs that are accredited and what you want to go to are competitive. The advantage you do have over orthopedics is that there are 112 accredited fp sports programs vs. 95 ortho.

Depends: It depends on where you want to go, how popular the fellowship is, and your cv/stats. Many programs/clinics/hospitals have only 1 fellowship spot in sports medicine, therefore these are highly competitive, especially in the big cities or at particular hospitals/clinics. Some may have more, but for most you can count the number of spots on one hand.